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x + y = 12 x - y = 10 What is the value of the x-determinant for the system shown? -22 -12 -2

Mathematics
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You use a 2x2 matrix for the system
The determinant of a 2x2 matrix is in this form |dw:1347994109583:dw| To find the determinant of such a matrix, you would use the equation of ad-bc
x + y = 12 would be for ab x - y = 10 would be for cd

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Other answers:

2x=22 x=11 is answer@den
For a 2×2 matrix, its determinant is found by subtracting the products of its diagonals (backward slash subtracted by the forward slash)

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